"The Messenger of Allah ﷺ said: 'Do Wudu' properly.'" [1] [1] Isbighu Al-Wudu'. And this narration supports the claim that some of them used this expression to mean "three times" for each limb, rather than "properly." (Using translation from Nasāʾī 142)
قَالَ رَسُولُ اللهِ ﷺ أَسْبِغُوا الْوُضُوءَ